I also purchased two Chinese LED fixtures. See MASA website for further details as there are a few of us now with them.
Initial impressions:
- seem well built. Infact they are quite heavy.
- fans are not really that loud, no louder than the little fan that was blowing the hot air from my MH from over the top of the tank.
- They are REALLY bright! Infact I think they would be easily as bright as a 250w MH. They even come close to my 400w MH, given it is raised about 40cm's above the water (for extra coverage) and the LED's are only 4cm's from the water.
- The heat they put out is minimal.
- One is not enough to cover a 4 foot tank. Mine are just supplementation to my 2 solar tubes so they are perfect.
- The corals certainly colour more than under both sunlight or 14k mh.
So far I have used a previous idea of using a clothes horse to suspend them above the water. I am undecided as to whether I'll hang them from the cables provided or built some sort of canopy/rack for them.
Here are some pics.
These are LED only on a 4 foot cube without solar tube light (9pm).